code: def test_init_processors(self):
      path = os.path.join(
          os.path.abspath(__file__),
          "../../../mmf/configs/datasets/vqa2/defaults.yaml",
      )
      args = dummy_args()
      args.opts.append(f"config={path}")
      configuration = Configuration(args)
      answer_processor = (
          configuration.get_config().dataset_config.vqa2.processors.answer_processor
      )
      vocab_path = os.path.join(
          os.path.abspath(__file__), "..", "..", "data", "vocab.txt"
      )
      answer_processor.params.vocab_file = os.path.abspath(vocab_path)
      self._fix_configuration(configuration)
      configuration.freeze()
  
      base_dataset = BaseDataset(
          "vqa2",
          configuration.get_config().dataset_config.vqa2,
          "train",
      )
      expected_processors = [
          "answer_processor",
          "ocr_token_processor",
          "bbox_processor",
      ]
  
      # Check no processors are initialized before init_processors call
      self.assertFalse(
          any(hasattr(base_dataset, key) for key in expected_processors)
      )
  
      for processor in expected_processors:
          self.assertIsNone(
              registry.get("{}_{}".format("vqa2", processor))
          )
  
      # Check processors are initialized after init_processors
      base_dataset.init_processors()
      self.assertTrue(
          all(hasattr(base_dataset, key) for key in expected_processors)
      )
      for processor in expected_processors:
          self.assertIsNotNone(
              registry.get("{}_{}".format("vqa2", processor))
          )
  
file_path: mmf/tests/datasets/test_base_dataset.py
imports: import os
  import unittest
  from mmf.common.registry import registry
  from mmf.datasets.base_dataset import BaseDataset
  from mmf.utils.configuration import Configuration
  from ..test_utils import dummy_args
label_desc: Use image node_id 1 for calling the TestBaseDataset obj's underlying member method code with example usage: obj.test_init_processors() without return types